High-pressure valve.



.T. S. GRIIVIES.

HIGH PRES'SUHE VALVE. APPLICATION FILED MAR. 13 1915.

1,160,070. Patented Nov'. 9, 1915.

stares ra THADDEUS S. GRIMES, OF COLUMBUS, GEORGIA, ASSIGNOR TO LUMMU'S COTTON GIN COMPANY, OF COLUMBUS, GEORGIA, A CORPORATION OF GEORGIA.

HIGH-PRESSURE vALvn.

Application filed March 13, 1915.

To all whom it may concern.'

Be it known that I, THADDEUs S. GRIMM, a citizen of the United States, residing at Columbus,-in the county of Muscogee and State of Georgia, have invented certain new and useful'lmprovements in l-ligh-Pressure Valves; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same..

rlhis invention relates to hydraulic valves, and especially to the general class of valves disclosed in Figures 2, Sandal. ,of Patent #1120474, issued December 8, 1914.

An object of the invention is to provide a valve to close against `fluid pressure wherein that fluid pressure serves to hold the valve closed against its own pressure.

A further object of the invention is to provide a valve having a predetermined area exposed to the fluid pressure tending to open the valve, with a greater area exposed to the same Huid pressure tending to close the valve.

A further object of the invention is to produce a valve having a separate part operating as a piston, such separate part being' mechanically raised and lowered and heldv in raised position b i such mechanical means, with means for conducting the Huid pressure through an orifice against the piston, and acting therein against such piston to hold the valve seated against its own fluid pressure; and to increase the seating pressure in the same ratio as the opening pressure is increased.

' With these and other objects in view, the

invention consists in certain novel constructions, combinations, and Varrangeniem; ot' parts as will be hereinafter more fully described and claimed.

In the drawings: 1 is a view or" the valve in side elevation, the valve housing being shown in section. Fig. 2 is a view of the valve shown in section, the valve housing being taken at right angles to the section of valve housing shown at F ig. 1.

Like .reference characters designate corresponding views.. Y

The improved valve mechanism which forms 'the subject-matter of this application comprises a valve proper 1G adapted to be against the seat 11 prevent Specification of Letters Patent.

i obvious that when fluid parts throughout the` severalv Serial N o. 14y 262.

at-times the passage of the fluid as indicated by the long arrows at Fig. 1. To close such valve, a pin 12 is mounted upon a mechanica l operating means as the that by manipulating such eccentric, the valve 10 is raised and lowered by the raising and lowering of the pin. This pin is in the Storm of a piston with a piston head 11 mounted within a portion of the valve member serving as a cylinder with a packing ring 15 which, 'when expanded by internal fluid pressure, serves to form a fluid-tight joint between such packing ring and the cylinder. Above the piston head 14 the pin 12 is extended as'shown at 12 to pass through the opening of the annular ring 15 and abut against the top wall of the chamber in the valvefhereinatter referred to.

Through the valve member 10 an orice 16 is provided forming communication between the chamber of the valve housing receiving the fluid pressure and a, chamber 17 formed within the valve member. It is passes through the orice 16 into the chamber 17 it will bear against the piston head 141 and serve to force the piston downwardly, or, if the downward movement of the piston is resisted, then to raise the valve member. It will also be noted that the area of the piston head 14C is greater than the 10 and that the fluid passing through the orifice 16 is the fluid which acts against the top of the valve so that the pressure of the Huid within the chamber-17 is at all times equal to the pressure of the chamber upon the top of the valve.

ture as shown in this drawing, when the fluidk pressure above the'vallve builds up, it also builds up within the chamber 17 and any giving l of the pin 12 vor eccentric 13 is compensated for by the movement provided for between the valve member 10 and the piston head 14r-the pressure of the fluid constantly acting to hold the valve to seat by acting against the piston head which is more particularly at Fig. 2. en it is free 4 give a limited distance as shown Patented Nov. 9, 1915.

eccentric 13, so'

exposed 'area of the valve desired to open the valve, the mechanical 18,7".vhen the valve and the pin becomes a rifid structure, and any further operation.

of the eccentric .permits the entire structure to drop, thereby opening the valve in the usual manner. When the valve is to be closed the pin 12 is raised bringing the extended portion 12 into engagement with the upper wall of the chamber 17, and the continued raising of the pin 12 by the eccentric forces the valve l0 upwardly to seat. This mechanical closing of the valve 'is suficient when l the valve is first closed and before the fluid pressure above the valve has built up to such an extent as to cause sucha yielding of the support and housing as will force the Valve open if retained in such closed position only by such mechanical means. As has been previously pointed out,

however, When the pressure above the valve builds up, it also builds up in the chambei' v17 and the effective area within such chamber being greater than the effective area at the top of the valve, such fluid pressure maintains the valve in closed position against its own pressure.

I claim: I. In a-valve, a valve member, a valve seat, a member movable within a chamber formed in the interior of the valve member,

said valve member having an orifice communicating between'such chamber and the lpressure-receiving side of the valve, and means to raise the valve to seat by such movable member.

2. In a valve, av housing embodying a valve seat, a valve member proportioned to coperate with and close against the seat and exposing a predetermined area to fluid -formed within the valve,

a piston Aslidable in a chamber l means acting against the piston to raise the valve to s eat,

said valve being provided with an orifice forming communication between the prespressure,

surereceiving area of the valve andthe chamber.

3. In a valve, a valve housing embodying a valve seat, a valve proportioned -to coact with and be seated against the seat, a piston slidable within the valve -member and having an area greater than the portion o f the valve exposed to fluid pressure, said.'

valve being provided with va passage forniing communication from the pressure-receiving area to the piston, and mechanical means adapted to act upon the piston to raise and maintain the valve in raised position.

4. In a valve, a valve housing embodying a valve seat, a reciprocating valve proportioned to be seated against the seat, and providing a predetermined area exposed through the seat to the Huid pressure, a piston slidable within a chamber formed in posing a greater area than the exposed.v area of the valve, said valve being provided with a passage 'forming communication between the exposed area of the valve and the chamthe interior of the valve member and exber, a valve stem carried by the valve and extending outwardly therefrom, and mechanical means acting against the valve stem adapted to raise thepiston and the THADDnUs s. GRiMEs.

Witnesses:

THOMAS O. O'r'i, E. J WiLiiiAiis. 

